libjsonpb: fix tests for new protobuf version

Bug: 117607748
Test: atest --host libjsonpbverify_test
Change-Id: I5ce89c330d769fac10d8092734a37c26694587a2
Merged-In: I5ce89c330d769fac10d8092734a37c26694587a2
1 file changed